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Model Scale and "Real" Flight of Generic UCAV and Advanced Combat Aircraft - An Industrial Perspective

Zimper, Dirk and Hitzel, Stephan M. (2014) Model Scale and "Real" Flight of Generic UCAV and Advanced Combat Aircraft - An Industrial Perspective. In: 32nd AIAA Applied Aerodynamics Conference. American Institute of Aeronautics and Astronautics. AIAA AVIATION 2014, 16.-20. Jun. 2014, Atlanta, Georgia, USA. ISBN 978-1-62410-288-2 ISSN 2014-2267

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Official URL: http://arc.aiaa.org/doi/abs/10.2514/6.2014-2267

Abstract

An industrial view on experimental and numerical investigations related to advanced combat aircraft needs is given. A critical comparison in between experimental and numerical results under wind tunnel conditions and real flight numerical simulations is presented. The Reynolds and Mach number influence on the aerodynamic behavior together with the development of the complex flowfields around generic UCAV configurations at transonic speed, medium and high angles of attack conditions is discussed. Static CFD results of forces and moments as well as the flow structure of the longitudinal and lateral flow conditions are compared to wind-tunnel measurements. Here combat aircraft and flying-wing type UCAV flow-phenomena of such as separation emerging at round and sharp leading edges into interacting vortex flows are shown. Also their possible development at transonic conditions causing interacting shock-systems are addressed. While wind-tunnel (low) Reynolds number, subsonic conditions are thought economic, they may be far off flight (high) Reynolds number and realistic subsonic and transonic Mach number speeds. Therefore also free-flight, full-scale conditions have been prepared to probe the possible differences with the experimental and numerical investigations of the design and early development process of future shapes. This will show the sensitivity and possible basic uncertainty of the stability & control investigations of modern combat aircraft due to insufficient full-scale, free-flight knowledge.

Item URL in elib:https://elib.dlr.de/89699/
Document Type:Conference or Workshop Item (Speech)
Title:Model Scale and "Real" Flight of Generic UCAV and Advanced Combat Aircraft - An Industrial Perspective
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Zimper, Dirkdirk.zimper (at) dlr.deUNSPECIFIED
Hitzel, Stephan M.UNSPECIFIEDUNSPECIFIED
Date:2014
Journal or Publication Title:32nd AIAA Applied Aerodynamics Conference
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Publisher:American Institute of Aeronautics and Astronautics
ISSN:2014-2267
ISBN:978-1-62410-288-2
Status:Published
Keywords:UAV, UCAV, combat aircraft, transonic flow, aerodynamic behaviour, SACCON, Stability & Control, Vortex, Shock Wave, Reynoldsnumber effects, Reynolds number, experimental, numerical, transonic speed, flow separation, Reynolds number effects, full-scale conditions, FCS, Flight Control System, lateral, lateral motion, Yaw, Pitch, Roll,
Event Title:AIAA AVIATION 2014
Event Location:Atlanta, Georgia, USA
Event Type:international Conference
Event Dates:16.-20. Jun. 2014
Organizer:American Institute of Aeronautics and Astronautics
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Military Technologies, L - Flight Physics
Location: Köln-Porz
Institutes and Institutions:Program Coordination Defence & Security Research
Institute of Aerodynamics and Flow Technology
Institute of Aerodynamics and Flow Technology > Transport Aircraft
Deposited By: Zimper, Dr.-Ing. Dirk
Deposited On:03 Sep 2014 14:27
Last Modified:06 Jun 2016 14:08

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